HomeRoast Digest

Topic: Cheap, new PIDs on eBay (5 msgs / 175 lines)
1) From: Dan Bollinger
These Omega CN76020 PIDs are for sale at $60.00http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item78537606&rd=1Power: 85 TO 265VDC/VAC
Thermocouple or RTD input
Two outputs
1/16 DIN - About 2" x 2" x 5"
Replaced by the new CN77000 serieshttp://www.omega.com/ppt/pptsc.asp?ref77000&Nav=a03
The Manual:http://lists.sweetmarias.com/mailman/listinfo/homeroast">http://www.omega.com/manuals/manualpdf/M1303.pdfhomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

2) From: Ed Needham
Dan...Do you know how to hook these things up?  And do they also require
relays on the output side to control peripherals?  I am a complete novice
when it comes to electronic controls.
Ed Needhamhttp://www.homeroaster.comed

3) From: Dan Bollinger
Ed,  There are three basic steps.  1. Mechanically mounting the PID.  2.
Wiring it up to power, the machine and a thermocouple.  3. Programming the
PID. Luckily, others have done this to the Silvia before.  Since I haven't,
you might read these items first. I have installed PIDs before and the
learning curve is steep, but very, very short. Did you notice the manual for
the ebay PID is online?  Danhttp://www.lucidcafe.com/cafeforum/schomertable27.htmlYou won't need a relay, since there is probably one on your machine already.">http://www.coffeegeek.com/forums/espresso/questions/661http://my.execpc.com/~n9zes/silvia/silvia.htmlhttp://www.lucidcafe.com/cafeforum/schomertable27.htmlYou won't need a relay, since there is probably one on your machine already.
The wiring steps are:
1. Run 120 VAC to the PID
2. Connect the thermocouple leads to the PID
3. Connect the PID output to the Solid State Relay (SSR) on the espresso
machine. (see the above websites for a picture of what an SSR looks like)
Personally, I'd run the PID in series with the existing pressurestat and set
the pressurestat up to about 1.4 bar.  That way it will act as an
over-pressure switch and turn the heater off is something goes awry.  Dan
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

4) From: Dan Bollinger
I just looked further on the Sylvia PID conversion page and you will have to
buy and install an SSR to control the heater.  Some espresso machines like
the Isomac already have an SSR onboard.  Danhttp://lists.sweetmarias.com/mailman/listinfo/homeroast">http://my.execpc.com/~n9zes/silvia/silvia.htmlhomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

5) From: tk
Here is a pretty example. With pictures! In this case, the
tweaker is working with a Fuji controller to improve her

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